OPERATION
Timing between rotatina hook motion
and
needle
motion
(DSet
stitch length on
the
stitch length setting
dial
shown
table.
(2)
When
needle
is
lifted
@
shown
table,
from
the
lowest position, the following positional relation
ship
should
be maintained.
—The
upper edge of needle eye should be
1.0
~ 1.6 mm
below
the
hook point.
—The
hook point should be located at the
center
of
needle
axis.
—Gap
between the hook point and the side
face
of
needle
should
be
0.05mm.
(3) Needle/rotating hook position can be ad
justed
as
follows.
(For easy adjustment, it is recommended
that the presser foot, throat plate and feed
dog assemblies are removed.)
•
Position
adjustment
of
hook
point
Adjust the hook point so that it comes to the
center
of
needle
axis.
ID Lean
the
machine
head
backward
and
loosen
three
set screws of hook
shaft
gear (small).
(2) Turn the balance wheel and stop when the
needle
is
lifted
(§)
mm
shown
table
from
the
lowest
position.
(3)
Rotate
the
hook
by
hand
to position
the
hook
point
to
the
center
of needle axis.
(4) Move the
hook
bracket
leftward or right-
ward and position it so that gap between the
hook point and side face of needle is 0.05
mm.
For
this
adjustment,
each
screws
(§)
,(§)
and
two
of
should
be
loosened.
Note:
In
the
adjustment,
do
not
excessively
loosen set screws©and always maintain mesh
ing of
hook
shaft
gear
and
lower
shaft
gear.
(5) Tighten the set screwsinthe followingorder:
(j)
While
pressing
the
lower
shaft
gear
(large)
against the side face of hook bracket,
tighten the set screws(£)first.
@
After
checking
gap
between
the
needle
and the
hook,
tighten
theset
screws@^
(D
Then
tighten
thesetscrews®.
—
10
—
--—.....^Cla^
-L
-M
-B
Set
the
stitch
length
2
3
4.5
Needle
lift
2.0
mm
2.2
mm
2.4
mm
Gap®
1.0
~
1.6
mm
Clearance
©
0.05
mm
Hook
point
Set screw of
hook
shaft gear (small)
Set
screw
of
lower
shaft gear (large)
Set
screw
Set
screw
Q)
Set
screw
\
Set
screw
(B
Set
screw
®
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